Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Kurt, Kemal(9)
- Yilmaz, Ozgur(7)
- Doğan, Kadir Caner(6)
- Alemdag, Selcuk(5)
- Demir, Selim(5)
- Güngör, Nihan(5)
- Turan, İbrahim(5)
- Vural, Alaaddin(5)
- Ünker, F.(5)
- Akpinar, Adem Sefa(4)
- Akyüz, Ahmet Mutlu(4)
- Doğan, Orhan Veli(4)
- Doğan, Süheyla(4)
- Gurocak, Zulfu(4)
- Maden, Nafiz(4)
- Menteşe, Ümit(4)
- Okan, Tarhan(4)
- Saridogan, E(4)
- Sener, S(4)
- Staub, S(4)
- Çalışır, Gülsüm(4)
- Çuvalci, O.(4)
- Adanur, Süleyman(3)
- Akaryali, Enver(3)
- Artan, Seyfettin(3)
- Ashyralyyev, Charyyar(3)
- Aydin, Musa(3)
- Baskent, Emin Zeki(3)
- Bayraktar, Alemdar(3)
- Bingöl, Ozkan(3)
- Bostan, Sedat(3)
- Ceylan, D.(3)
- Damlıbağ, Fatih(3)
- Dincel, Gungor Cagdas(3)
- Duran, Celal(3)
- Günaydin, Murat(3)
- Hayaloğlu, Pınar(3)
- Kalkışım, Özgün(3)
- Ozdes, Duygu(3)
- Saylan, Kemal(3)
Yayınlar
- MakaleAçık Erişim2015Comparison of perioperative oxidative stress in endovascular and open repair of abdominal aortic aneurysm
Doğan, Orhan Veli; Menteşe, Ümit; Doğan, Süheyla; Usta, Sefer; Turan, İbrahim; Haliloğlu, Ergün; Karahan, Süleyman Caner
Background/aim: To investigate the differences in perioperative oxidative stress (OS) in abdominal aortic aneurysm (AAA) patients treated with either endovascular repair (EVAR) or open repair (OR).; Materials and methods: Twenty patients (11 OR, 9 EVAR) treated for AAA with no known malignant or inflammatory disease and an aneurysm diameter of over 5 cm and no rupture were included in the study. Blood samples were obtained preoperatively, during aortic occlusion, and 1 h and 24 h after reperfusion. Total antioxidant status (TAS), total oxidative stress (TOS), and malondialdehyde (MDA) levels were measured and oxidative stress index (OSI) was calculated.; Results: OSI at 1 h and 24 h after reperfusion was higher in the EVAR group (P = 0.004 and P = 0.002, respectively). TAS levels were higher (P = 0.001, P = 0,029). MDA levels showed no difference (P = 0.291, P = 0.076). TOS levels were lower 24 h after reperfusion in the EVAR group (P = 0.018). Conclusion: Markers of oxidative stress were lower in the EVAR group. This may be associated with advantages of EVAR. More studies are required for a clear-cut conclusion.
- MakaleYalnız künye2015Geochemistry, Re-Os isotopes and highly siderophile element abundances in the Eastern Pontide peridotites (NE Turkey): Multiple episodes of melt extraction-depletion, melt-rock interaction and fertilization of the Rheic Ocean mantle
Dokuz, Abdurrahman; Uysal, Ibrahim; Dilek, Yildirim; Karsli, Orhan; Meisel, Thomas; Kandemir, Raif
We report on the structure, geochemistry, Re-Os isotopes and relative abundances of highly siderophile elements (HSEs) of the Paleozoic peridotite-basalt occurrences in the Eastern Pontide belt of northeastern Turkey. These peridotites and the associated basaltic rocks are the remnants of the Rheic oceanic lithosphere, incorporated into the Eurasian continental margin during the Variscan (Hercynian) orogeny. The peridotites display a complex record of multiple magmatic, metasomatic and metamorphic events in different tectonic settings during the evolution of the Rheic upper mantle. The Beyçam harzburgite (BH) contains low Al2O3 (0.51-1.88 anhydrous wt.%) and high MgO (41.35-42.34 wt.%) contents, and its bulk-rock trace element compositions are less than 10% of the primitive upper mantle (PUM) values. The platinum, Pd and Re contents of the Beyçam harzburgite are highly depleted, whereas its Os, Ir, and Ru contents are slightly enriched relative to the PUM values. Its Pd and Re contents that are higher than those of the fertile Pulur lherzolite (PL) to the south and the absence of an isochronous relationship between its 187Os/188Os and 187Re/188Os show that the trace element distribution and the isotope ratios of the Beyçam harzburgite were significantly modified after the first melt-extraction episode. The first melt extraction occurred beneath the Rheic mid-ocean ridge spreading center, whereas the second melt extraction occurred in a mantle wedge above a Rheic subduction zone. The primary magmatic phases of the Pulur lherzolite show the geochemical characteristics typical for fertile lherzolite, formed in the early stages of oceanic lithosphere generation subsequent to the continental break up. The Pulur lherzolite also contains a secondary magmatic phase in the form of networks of clinopyroxene veins and channels, which are interpreted as an evidence for solid state melt-rock reactions between the lherzolite and a percolating basaltic melt above a subduction zone. This clinopyroxene addition resulted in the formation of variable concentrations of Al2O3 (2.47-4.33wt.%) and MgO (29.76-40.10wt.%) in the lherzolite. The rhenium, Pd and Pt concentrations of the Pulur lherzolite are depleted relative to the PUM values, whereas the Os, Ir and Ru concentrations are in the range of the PUM values as commonly observed in peridotites with a melt depletion history. The high suprachondritic 187Os/188Os is, however, inconsistent with a simple melt depletion history, and can be explained by the addition of radiogenic Os-bearing sulfide phases into the lherzolite as a result of melt-rock reactions. Basaltic rocks with an island arc tholeiitic composition from the Beyçam area represent the partial melting product of the moderately depleted Beyçam harzburgite and the basaltic parental melt from which the clinopyroxene precipitated. The covariation between the 187Re/188Os and 187Os/188Os of these basaltic rocks defines an isochron age of 377±8Ma (late Devonian). The combined structural, geochemical and isotope data indicate a prolonged history of multiple episodes of melt extraction-depletion, and melt-rock interaction and fertilization of the mantle lithosphere of the Rheic Ocean.
- MakaleYalnız künye2015Mushroom management theory; Sample of health sector
Kiliç, Taşkin
Keeping in the dark by senior management from their subordinates is referred as "Mushroom Management". Within the scope of the present study, Mushroom Management application and exposure levels of administers and employers in the health industry were tried to be determined. The theoretical part of the study has been developed based on reviews of literature and in conjunction with conducted researches. Field research has been completed by using interview method, applied to 30 senior level health managers and 30 health workers from Gümüşhane city in Turkey. According to the obtained results, 84% of managers apply mushroom management style, and 87% of employees perceive mushroom management behaviors.
- MakaleAçık Erişim2015A new species of Zachaeus C.L. Koch from Turkey (Opiliones, Phalangiidae)
Kurt, Kemal; Koç, Halil; Yağmur, Ersen Aydın
A new species of harvestmen, Zachaeus seyyari sp. n. (Opiliones, Phalangiidae), is described and illustrated on the basis of both sexes from Şırnak Province in Turkey. Differences between the new species and related species are indicated. Photographs of its characteristic structures are also provided.
- MakaleYalnız künye2015Distortion bounds for a new subclass of analytic functions and their partial sums
Aktaş, Ibrahim; Orhan, Halit
In the present paper, we introduce a new subclass of functions which are analytic in the open unit disk. Also, we obtain coefficient inequalities for functions belonging to this class. Futhermore, we give some results associated with distortions bounds. In addition to that, we investigate lower bounds for partial sums of functions belonging to this class.
- MakaleYalnız künye2015Numerical solution to inverse elliptic problem with neumann type overdetermination and mixed boundary conditions
Ashyralyyev, Charyyar; Akkan, Yasar
This article studies the numerical solution of inverse problems for the multidimensional elliptic equation with Dirichlet-Neumann boundary conditions and Neumann type overdetermination. We present first and second order accuracy difference schemes. The stability and almost coercive stability inequalities for the solution are obtained. Numerical examples with explanation on the implementation illustrate the theoretical results.
- MakaleYalnız künye2015Evaluation of energy absorption of macro synthetic and steel fiber reinforced concretes; [Evaluarea capacitătii de absorbţie a energiei de către betonul armat cu fibre macro sintetice şi fibre de oţel]
Bolat, Hakan; Şìmşek, Osman
This study aims to determine the energy absorption of concrete slabs (60×60×10cm) using polyester, polypropylene and steel fiber reinforced (SFRC, PYFRC, PPFRC) according to EN 14488-5. Significant differences in the energy absorption were observed between the concrete slabs strengthened with different fibers. The highest gain in energy absorption was observed in SFRC. Furthermore, concrete slabs strengthened with PPFRC and PYFRC showed 23.4% and 14.8% less energy to SFRC. Although the SFRC showed the highest energy absorption under directly negative conditions, it is important to evaluate the durability issues associated with SFRC, such negative conditions.
- MakaleAçık Erişim2015Selective separation, preconcentration and determination of Pd(II) ions in environmental samples by coprecipitation with a 1,2,4-triazole derivative
Ozdes, Duygu; Duran, Celal; Serencam, Huseyin; Sahin, Deniz; Gundogdu, Ali; Soylak, Mustafa
A simple, sensitive, facile and low cost methodology, combined with flame atomic absorption spectrometry (FAAS), was employed to evaluate the selective separation and preconcentration of Pd(II) ions in environmental samples by using a triazole derivative as an organic coprecipitating agent without a carrier element. The developed method was systematically investigated in different set of experimental parameters that influence the quantitative recovery of Pd(II) ions. The accuracy of the method was tested by analyzing certified reference material and spike tests. The developed coprecipitation procedure has been applied to road dust, anodic slime, industrial electronic waste materials and water samples to determine their Pd(II) levels.
- MakaleYalnız künye2015The impact of developments in the logistics sector on economic growth: The case of OECD countries
Hayaloglu, Pinar
Logistic sector, which is considered as an important interface of increased international trade in consequence of globalization, plays an important role on countries’ economic growth and development. A development in logistic sector facilitates the international trade, increases the competitiveness in countries and thus appears to be an important determinant of growth and development. In this study, the impact of developments in the logistic sector on economic growth has been investigated for 32 OECD countries covering the period 1994-2011. In this context, static panel data analysis was used. The findings obtained in the study, which used different variables as indicators of developments in the logistic sector, reveals that the relationship between developments in the logistic sector and economic growth differs depending on the indicator used.
- MakaleAçık Erişim2015Approximation of the inverse elliptic problem with mixed boundary value conditions and overdetermination
Ashyralyyev, Charyyar; Dedeturk, Mutlu
In the present study, the inverse problem for a multidimensional elliptic equation with mixed boundary conditions and overdetermination is considered. The first and second orders of accuracy in t and the second order of accuracy in space variables for the approximate solution of this inverse problem are constructed. Stability, almost coercive stability, and coercive stability estimates for the solution of these difference schemes are established. For the two-dimensional inverse problems with mixed boundary value conditions, numerical results are presented in test examples.
- BildiriYalnız künye2015Investigating the geophysical characteristics of gypsum through GPR
Sari, M.S.; Bektaş, Ö.B.
Gypsum crops out widely in the areas where the urbanization is intense in Sivas city center. In this study, in an appropriate selected area, geophysical characteristics and structure of gypsum have been investigated by applying geophysical methods of GPR (Ground Penetrating Radar). GPR measurements have been taken as 11 profiles with a Ramac GPR device by using 250 MHz shield-antenna. The distance between each profile has been taken as 2m and the length of each profile has been taken as 50m. All the area has been surveyed and ground radar sections have been obtained by GPR method. Gathering all the data, it has been found out that the areas with strong reflections (for the first 5m. depth) revealed in ground radar sections are not homogeneous massive gypsum bodies as presented in geological studies and contain different size and position fill material (clastic material). In addition, investigating such areas through GPR method has enabled to reveal the geophysical characteristics of the region as gypsum contains fractures-cracks, fillings and dissolution spaces.
- MakaleAçık Erişim2015Waste generation and utilisation in micro-sized furniture-manufacturing enterprises in Turkey
Top, Y.
The number of small-scale businesses within most national economies is generally high, especially in developing countries. Often these businesses have a weak economic status and limited environmental awareness. The type and amount of waste produced, and the recycling methods adopted by these businesses during their operation can have negative effects on the environment. This study investigated the types of waste generated and the recycling methods adopted in micro-sized enterprises engaged in the manufacture of furniture. An assessment was also made of whether the characteristics of the enterprise had any effect on the waste recycling methods that were practised. A survey was conducted of 31 enterprises in the furniture industry in Gumushane province, Turkey, which is considered a developing economy. Surveys were undertaken via face-to-face interviews. It was found that medium-density fibreboard (MDF), and to a lesser extent, chipboard, were used in the manufacture of furniture, and two major types of waste in the form of fine dust and small fragments of board are generated during the cutting of these boards. Of the resulting composite board waste, 96.9% was used for heating homes and workplaces, where it was burnt under conditions of incomplete combustion. Enterprises were found to have adopted other methods to utilise their wastes in addition to using them as fuel. Such enterprises include those operating from a basement or first floor of a building in the cities, those continuing production throughout the year, those in need for capital and those enterprises not operating a dust-collection system.
- MakaleYalnız künye2015Contamination assessment of heavy metals associated with an alteration area: Demirören Gumushane, NE Turkey
Vural, Alaaddin
Soil samples collected from Demirören Alteration area, Gümüshane NE Turkey were analyzed for heavy metals by using Inductively Coupled Plasma-Atomic Emission Spectrometry and Inductively Coupled Plasma-Mass Spectrometry and the contamination level of heavy metals was assessed on the basis of Geoaccumulation Index, Enrichment Factor, Pollution Index and Integrated Pollution Index. The results indicated that, in comparison with background value of upper crust, soil samples in Demirören alteration area have elevated levels of metal concentrations as a whole. High Geoaccumulation Indexes and Enrichment Factors for molybdenum, lead, selenium, bismuth, cadmium and copper in alteration area indicated that there is a considerable amount of especially molybdenum, lead and copper pollution, which mainly originate from alteration in the area.
- MakaleYalnız künye2015On the solutions of time-fractio3nal generalized hirota-satsuma coupled-KDV equation with modified riemann-liouville derivative by an analytical technique
Merdan, Mehmet
In this paper, the fractional variational iteration method (FVIM) was implemented to solve timefractional generalized Hirota-Satsuma coupled-KDV equation with modified Riemann-Liouville derivative. A new application of fractional variational iteration method (FVIM) was extended to derive analytical solutions in the form of a series for these equations. It is indicated that the solutions obtained by the FVIM are reliable and effective method for strongly nonlinear couple partial equations with modified Riemann-Liouville derivative. The effects of different fractional derivative for the coupled system are investigated.
- MakaleYalnız künye2015Accident analysis with the random parameters negative binomial panel count data model
Coruh, Emine; Bilgic, Abdulbaki; Tortum, Ahmet
We analyzed factors affecting the frequency of accident counts in 81 cities over a three-year period (2008-2010) with monthly data using random-parameters negative binomial panel count data models. Among models considered, the random parameters model with the correlated coefficients outperformed the other models and was found to fit the data best with almost a perfect prediction of the conditional mean level. Most of variables used to control for the variation in the frequency of accident counts play crucial role with higher significance levels. Also, marginal effects and elasticity estimates were derived to get more insight into the effects of percent and unit changes in the dependent variable in response to changes in the exogenous variables.
- MakaleYalnız künye2015Tectonic evolution of the northern shelf of the Marmara Sea (Turkey): interpretation of seismic and bathymetric data
Tur, Huseyin; Hoskan, Nihan; Aktas, Gulten
This study is based on the geological interpretation of 250 km2 of multibeam bathymetric data coupled with 300 km of seismic profiles recorded on the northern shelf of the Marmara Sea offshore Büyükçekmece and Küçükçekmece Lagoons. The sea bottom morphology has a highly chaotic structure at the exit of the Büyükçekmece and Küçükçekmece lagoons. This chaotic surface structure is controlled by a basin-ridge system lying in the NE–SW direction at the exit of the Büyükçekmece Lagoon and by a relatively deep entrance observed at the exit of the Küçükçekmece Lagoon. In addition, the linear submarine slope parallel to the shoreline between the Istanbul Strait and the Küçükçekmece Lagoon is an important morphological structure of this area. The Istanbul Strait’s canyon on the northern shelf of the Marmara Sea and the elevated submarine plain west of this canyon are other important morphological structures observed at the sea bottom. The geologic interpretation of seismic profiles has allowed us to distinguish two seismo-stratigraphic units. The lower one is separated from the overlying units by a seismic sequence having a seismic facies from chaotic to parallel and the top represented by a high amplitude seismic reflector. Since these units get close to the sea bottom rising landwards, they are inferred to be the seaward continuation of the Oligocene–Upper Miocene units widely exposed on land. The upper unit, overlying the acoustic basement, whose parallel internal reflections onlap and downlap on the top of the acoustic basement, is interpreted as a Quaternary basin fill. Two groups of faults have been identified on seismic profiles and identified based on their characteristics in the study area. The first group consists of dip-slip faults trending NNE–SSW. These faults border the western slope of the Bosporus and the NNE–SSW trending basins offshore of the Büyükçekmece Lagoon. The second group of faults consists of NW–SE oriented strike-slip faults. These faults have created the linearities in the same direction at the sea bottom. As the result of comparison of these NW–SE-faults to the North Anatolian Fault Zone (NAFZ), this group of faults is likely to have a relation with the NAFZ. Therefore, it is considered that the mentioned faults may be reactivated in the region due to the stress created by the NAFZ.
- MakaleAçık Erişim2015Synthesis and biological evaluation of a new series of 4-alkoxy-2-arylquinoline derivatives as potential antituberculosis agents
Tosun, Gonca; Arslan, Tayfun; Iskefiyeli, Zeynep; Küçük, Murat; Karaoʇlu, Şengül Alpay; Yayli, Nurettin
Three new series of 33 quinolone compounds, 2-(2-, 3-, and 4-fluorophenyl)-4-O-alkyl(C5-15)quinolines (7a-k, 8a-k, and 9a-k), were synthesized from 2-(2-, 3-, and 4-fluorophenyl)-2,3-dihydroquinolin-4(1H )-one (4, 5, and 6) by the reaction of alkyl halides under basic conditions in DMF. The new compounds 7a-k, 8a-k, and 9a-k were synthesized from flavonones 4-6, which can be considered new precursors for quinoline synthesis through a one-step reaction. All the target compounds (7a-k, 8a-k, and 9a-k) were evaluated for their in vitro antimicrobial activity against nine test microorganisms. They showed the most activity against Mycobacterium smegmatis with minimum inhibitory concentrations (MIC) of 62.5-500 μg/mL, indicating their potential uses as antituberculosis agents. Among them 8a-k (m-fluoride) were the most active compounds against M. smegmatis (MIC, 62.5-125 μg/mL). The newly synthesized title compounds were also evaluated for their in vitro antioxidant activities using DPPH• radical scavenging and FRAP tests. They showed at a low concentration (mg/mL) a range of SC50 values of 0.03-12.48 mg/mL (DPPH•) and 0-722 μM (FRAP), respectively. The antioxidant results of compounds 7a-k, 8a-k, and 9a-k revealed that the length of the alkyl chain was negatively correlated with antioxidant capacity.
- MakaleAçık Erişim2015Some aspects of Lqυ (Rd)∩Wp,wk (Rd)
Güngör, Nihan; Sağir, Birsen
Let 1≤q, p < ∞ and υ,w be Beurling's weight functions on Rd. In this article we deal with harmonic properties of intersection space Aq,pk,υ,w (Rd) = Lqυ (Rd) ∩ Wp,wk (Rd) defined by aid of weighted Lebesgue space Lqυ (Rd) and weighted Sobolev space Wp,wk (Rd). We research the inclusions and inequalities between the spaces Aq,pk,υ,w (Ω) where Ω ⊂ Rd be an open set. Finally, we proved that the spaces M (A1,pk,w (Rd), L1w (Rd)) can be identified with the weighted spaces of bounded measures Mw (Rd).
- MakaleYalnız künye2015Stochastic seismic analysis of Kömürhan Highway Bridge with varying material properties
Çavdar, Özlem; Bayraktar, Alemdar; Altunışık, Ahmet Can
Stochastic seismic finite element analyses of the Kömürhan Bridge, the material properties of which are described by random fields, are presented in this paper. The stochastic perturbation technique and Monte Carlo simulation (MCS) method are used in the analyses. A summary of MCS and perturbation-based stochastic finite element dynamic analysis formulation of the structural system is given. The Kömürhan Bridge, located on the 51st km of Elazığ-Malatya highway in the east of Turkey, was chosen as a numerical example. The Erzincan earthquake in 1992 was considered a ground motion, since it took place in the vicinity of the bridge. The material properties were considered to be random variables. During the stochastic analysis, displacements and internal forces of the bridge under consideration were obtained using the perturbation-based stochastic finite element method (SFEM), as well as the MCS method. The selected random variables were elastic modulus and mass density. The efficiency and accuracy of the proposed SFEM algorithm were validated through comparison with results of the MCS method.
- BildiriYalnız künye2015Antioxidant activity and total phenolic content of bergamot (citrus bergamia risso) fruits
Ercisli, Sezai; Uzun, Aydin; Yilmaz, Kadir Ugurtan; Sengul, Memnune; Yildiz, Hilal; Uysal, Onur; SabaterMunoz, B; Moreno, P; Pena, L; Navarro, L
Bergamot extract is used to obtain fragrant tea (Earl Grey) and also its rind is used to make some jams. Calcium citrate and citric acid can be obtained from bergamot juice. In the study, antioxidant and total phenolic content of bergamot juice were determined. Two methods, namely β-carotene bleaching and DPPH assay were used to determine total antioxidant capacity, while Folin-Ciocalteu reagent was used to determine total phenols. Results showed that bergamot had high total phenolic (80.06 μg GAE/mg DW) and also high total antioxidant capacity with β-carotene bleaching (60.12%) and with DPPH (180 mg/100 ml). The study demonstrates the nutritional potential of bergamot juice.